Synthesis, Structures, and Reactivity of Alkylgermanium(II) Compounds Containing a Diketiminato Ligand
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- 作者：Yuqiang Ding ; Qingjun Ma ; Herbert W. Roesky ; Regine Herbst-Irmer ; Isabel Usó ; n ; Mathias Noltemeyer ; and Hans-Georg Schmidt
- 刊名：Organometallics
- 出版年：2002
- 出版时间：November 25, 2002
- 年：2002
- 卷：21
- 期：24
- 页码：5216 - 5220
- 全文大小：132K
- 年卷期：v.21,no.24(November 25, 2002)
- ISSN：1520-6041
文摘
Reaction of [HC(CMeNAr)2]GeCl (Ar = 2,6-iPr2C6H3) with RLi (R = Me, nBu) in diethylether at -78 
C yielded the alkylgermanium(II) compounds [HC(CMeNAr)2]GeR (R = Me(5), nBu (6)), which are monomeric with a three-coordinate germanium center. Compound5 was oxidized with sulfur and selenium to afford [HC(CMeNAr)2]GeMe(E) (E = S (7), Se(8)), in which a terminal Ge=E double bond is present. Treatment of 5 with trimethylsilylazide in hexane at room temperature gave [HC(C(CH2)NAr)CMeNAr]GeMe(N(H)SiMe3) (9),containing a Ge-N single bond; the expected compound [HC(CMeNAr)2]GeMe(NSiMe3) witha Ge=N double bond was not observed. The latter reaction proceeds with migration of ahydrogen atom from a methyl group of the ligand backbone to the nitrogen atom bonded tothe silicon atom with formation of a methylene moiety. X-ray structural data are providedfor 5, 6, 8, and 9.
C yielded the alkylgermanium(II) compounds [HC(CMeNAr)2]GeR (R = Me(5), nBu (6)), which are monomeric with a three-coordinate germanium center. Compound5 was oxidized with sulfur and selenium to afford [HC(CMeNAr)2]GeMe(E) (E = S (7), Se(8)), in which a terminal Ge=E double bond is present. Treatment of 5 with trimethylsilylazide in hexane at room temperature gave [HC(C(CH2)NAr)CMeNAr]GeMe(N(H)SiMe3) (9),containing a Ge-N single bond; the expected compound [HC(CMeNAr)2]GeMe(NSiMe3) witha Ge=N double bond was not observed. The latter reaction proceeds with migration of ahydrogen atom from a methyl group of the ligand backbone to the nitrogen atom bonded tothe silicon atom with formation of a methylene moiety. X-ray structural data are providedfor 5, 6, 8, and 9.